• Journal of the Korean Society of Industry Convergence
• /
• v.25 no.2_2
• /
• pp.199-208
• /
• 2022

The steel wire or steel bar processing process applied to the manufacture of various bolts and power transmission shafts was improved by applying in-line phosphate film treatment technology. By applying a polymer lubricant for a non-reactive metal forming process and a non-reactive non-phosphorus lubricating coating agent, the film formation for each process time was comparatively analyzed and reviewed. Compared to the nine processes applied previously, the in-line phosphate film treatment technology applied with only two processes has been effectively improved in terms of reduction of treatment time, reduction of facility installation area, prevention of water pollution due to wastewater, and non-use of ozone-depleting substances. In addition, it was found that it can have an important effect on productivity improvement and price competitiveness from the simplification of quality control and process control as well as improvement of the working environment.

• 월간 기계설비
• /
• s.294
• /
• pp.128-130
• /
• 2015

한국의 제조, 공업, 건설시장의 성장에 따라 국내 펌프 수요도 날이 갈수록 늘고 있다. 이에 대한 수요에 대응하여 펌프전문기업인 한일펌프는 창립 50주년을 맞아 에너지 절감형 개별인버터 펌프 신제품인 쿨런트 펌프를 선보였으며, ALL스테인레스 환풍기 및 송풍기 외 양흡입 송풍기 인라인휀 포터블팬 등 다양한 풍력 제품들도 출시했다. 한일전기는 녹 발생이 없는 ALL스테인리스 펌프를 비롯해 현장 수요에 맞춰 필요 부품의 생산부터 조립 테스트 등 부스터 및 산업용 펌프 24시간 제품 출고 시스템을 구축하는 등 차별화된 서비스를 제공하고 있다.

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2011.05a
• /
• pp.147-148
• /
• 2011

아연말 코팅은 희생부식에 의한 기재보호의 수단으로서 사용되고 있으며, 현재 볼트의 절반을 차지하고 있는 주요 공정이라 할 수 있다. 본 연구에서는 실제 작업현장에서 사용되는 아연말 코팅액에 3가 chromate액을 배합하는 공정연구등 다양한 공정시스템을 적용하여 생산된 시제품들을 기존 볼트와의 내식성을 상호 비교하였다.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2016.02a
• /
• pp.109.2-109.2
• /
• 2016

현민지브이티(Genesis)는 중소기업청 중소기업개발지원사업의 일환으로 진행된 2014년도 구매조건부 신제품 개발사업에 선정되어 '극저온 G-M냉동기를 이용한 대용량 Cold Trap개발'과제를 수행하면서 32인치 급으로 수분에 대해서 30,000[L/s] 이상의 배기속도를 가지는 대형 CWP를 개발하고 있다. 1차년도(2015년) 목표는 80K에서 200W급 단단 G-M극저온 냉동기를 개발하는 것이고, 2차년도(2016년) 목표는 이를 장착하여 30,000[L/s]의 물 배기속도 능력을 갖춘 32인치(800mm)급 직부형(appendage) CWP를 개발하는 것이다. 여기에서 가장 큰 문제점은 CWP 시스템의 물 배기속도를 실제로 측정하는 것이다. 왜냐하면 지금까지는 물(H2O)이 가진 독특한 물리적 특성으로 인해 배기속도 측정에 많은 어려움이 있어 이론적으로 계산한 값을 사용해 왔다. (심지어 크라이오 펌프 제조사 조차도 실험하지 않고 이론적인 계산 값을 일반적으로 사용한다.) 그러나 최근 본 과제 외에 물 배기속도 측정에 관한 요구사례와 일부 크라이오 펌프 제조사에서 수행하고 있다는 보고가 있는 바, 실제 물배기속도 시스템을 구축하여 이론과 실제 사이의 차이와 측정의 어려움 등에 관해 규명하고자 하였다. 물 배기속도 측정 방법은 크게 2가지로 나눌 수 있다. 첫째, 시스템으로 흘리는 물의 양을 Liquid MFC를 이용하여 먼저 측정한 후 Vaporizer로 보내어 기화 시키며 배기속도를 측정하는 방법. 둘째, 물을 Vaporizer로 먼저 기화시킨 후에 High Temp. MFM으로 기체 유량을 측정하며 배기속도를 측정하는 방법이 그것이다. 이에 국내 최초로 두 가지 방법 모두를 사용하여 표준화 된 물 배기속도 측정 설비를 구축하였고, 20인치(500mm) 크라이오 펌프와 인라인(inline)형 CWP 모델에 대한 물 배기속도 측정을 성공적으로 완료할 수 있었다. 향후 본 시험 방법과 결과를 토대로 32인치(800mm) 직부형 CWP 모델에 대한 물 배기속도 측정시험을 수행하고자 한다.

• Journal of Korea Multimedia Society
• /
• v.10 no.10
• /
• pp.1271-1283
• /
• 2007

To detect defect of FPD(flat panel displays) is very difficult due to uneven illumination on FPD panel image. This paper presents a method to detect various types of defects using the approximated image of the uneven illumination by B-spline. To construct a approximated surface, corresponding to uneven illumination background intensity, while reducing random noises and small defect signal, only the lowest smooth subband is used by wavelet decomposition, resulting in reducing the computation time of taking B-spline approximation and enhancing detection accuracy. The approximated image in lowest LL subband is expanded as the same size as original one by wavelet reconstruction, and the difference between original image and reconstructed one becomes a flat image of compensating the uneven illumination background. A simple binary thresholding is then used to separate the defective regions from the subtracted image. Finally, blob analysis as post-processing is carried out to get rid of false defects. For applying in-line system, the wavelet transform by lifting based fast algorithm is implemented to deal with a huge size data such as film and the processing time is highly reduced.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.30 no.3
• /
• pp.162-169
• /
• 2017

Indium tin oxide (ITO) thin films show a low sheet resistance and high transmittance in the visible range of the spectrum. Therefore, they play an important role as transparent electrodes for flat panel displays. However, their resistivity is rather high for use as a transparent electrode in large displays. One way to improve electrical and optical properties in large displays is to use ITO/Ag/ITO multilayer films. ITO/Ag/ITO multilayer films have lower sheet resistance than single layer ITO films with the same thickness. Prior to the ITO/Ag/ITO multilayer experiments, optimal condition for thickness change are necessary. Their thicknesses were deposited differently in order to analyze electrical and optical properties. However, when optimal single film characteristics are applied to ITO/Ag/ITO multilayer films, other phenomena appeared. After analyzing the electrical and optical properties by changing ITO and Ag film thickness, ITO/Ag/ITO multilayer films were optimized. By combining ITO film at $586\;{\AA}$ and Ag film at 10 nm, the ITO/Ag/ITO multilayer films showed optimized high optical transmittance of 87.65%, and the low sheet resistance of $5.5{\Omega}/sq$.

• Journal of Internet Computing and Services
• /
• v.7 no.3
• /
• pp.119-132
• /
• 2006

The network based security techniques well-known until now have week points to be passive in attacks and susceptible to roundabout attacks so that the misuse detection based intrusion prevention system which enables positive correspondence to the attacks of inline mode are used widely. But because the Misuse detection based Intrusion prevention system is proportional to the detection rules, it causes excessive false alarm and is linked to wrong correspondence which prevents the regular network flow and is insufficient to detect transformed attacks, This study suggests an Intrusion prevention system which uses Support Vector machines(hereinafter referred to as SVM) as one of rule based Intrusion prevention system and Anomaly System in order to supplement these problems, When this compared with existing intrusion prevention system, show performance result that improve about 20% and could through intrusion prevention system that propose false positive minimize and know that can detect effectively about new variant attack.

• Journal of the Korean association of regional geographers
• /
• v.15 no.2
• /
• pp.250-260
• /
• 2009

The purpose of the research is to investigate the possibility of the tourism resources development preference of sport leisure event activity of participation as one use MDS and clustering market character. An empirical research has been undertaken the questionnaire had be distributed to the whole country inline marathon races participation and there were 330 responses. The research was conducted by using statistical packages of SPSS program. As research methods factor analysis and cluster analysis were also employed. Three distinct cluster groups were categorized by their characteristics: 'money acquirement participation', 'self realization moderators', 'self realization enthusiasts', and there was differences among segmented groups in terms of their affecting factors to the tourism resources development preference. These findings suggested that there were need to tourism resources development for different segmented groups of sports leisure event activity selection attributes and each group pursued different satisfaction.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.18 no.4
• /
• pp.344-349
• /
• 2005

The optical and electrical characteristics of plasma display panel(PDP) using the vacuum in-line sealing technology compared with the conventional sealing process in this research. This PDP consisted of MgO protecting layer by e-beam evaporation and battier rib, transparent dielectric layer, dielectric layer, and electrodes by screen printer and then sealed off on Ne-Xe(4 ％) 400 Torr and 430。C. The brightness and luminous efficiency were good as the base vacuum level was higher, and it was to check the advantage of high vacuum level sealing, one of the strong points of the vacuum in-line sealing process. However, the brightness and luminous efficiency was dropped sharply because of a crack on MgO protecting layer by the difference of the expansion and contraction stress on high temperature in the vacuum states between MgO and substrate. Fortunately, the crack was prevented by MgO was deposited on higher temperature than 300。C. Finally, the PDP, was fabricated by the vacuum in-line sealing process, resulted the lower brightness than processing only the thermal annealing treatment in the vacuum chamber, but the luminous efficiency was increased by the reducing power consumption with the decreasing luminous current. The vacuum in-line sealing technology was not to need the additional thermal annealing process and could reduce the fabrication process and bring the excellent optical and electrical properties without the crack of MgO protecting layer than the conventional sealing process.

• Plant Journal
• /
• v.9 no.2
• /
• pp.42-45
• /
• 2013

The worldwide issue of greenhouse gas reduction has recently drawn great attention to carbon capture and storage(CCS). In this study, we developed a 10,000 ton/year pilot injection plant for geological storage of carbon dioxide. Major components of the pilot plant include a pressure pump, a booster pump, and an inline heater to bring liquid carbon dioxide into its supercritical state. The test results show that the pilot plant readily achieves the injection pressure and temperature, showing satisfactory control performance. The overall power consumption is 2,000 ~ 2,500 W, more than 75% of which consumed by the pressure pump. This study will facilitate varied research on greenhouse gas reduction as the only domestically developed system for geological injection.